/*
 * Challenge mode panel.
 *
 * Every selector here is scoped to the component's own class names, or to the
 * #challenge-mode mount point, so that the rest of the page can be restyled
 * without colliding with this file. Colours follow the existing UI: light
 * panels, the #1769aa blue accent, and green/red only for pass and fail.
 */

#challenge-mode {
    margin-top: 12px;
}

.challenge-panel {
    padding: 12px 14px;
    border: 1px solid #c7d3df;
    border-radius: 6px;
    background: #f4f8fb;
    color: #1f252a;
    font-size: 14px;
}

.challenge-heading {
    margin: 0;
    font-size: 18px;
}

.challenge-intro {
    margin: 6px 0 0;
    max-width: 74ch;
    color: #3c4750;
    line-height: 1.45;
}

/* Controls and the one-line score */

.challenge-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.challenge-start,
.challenge-stop {
    padding: 8px 14px;
    border: 1px solid #56616b;
    border-radius: 4px;
    background: #ffffff;
    color: #1f252a;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.challenge-start:hover,
.challenge-stop:hover {
    background: #eef2f5;
}

.challenge-start:disabled {
    border-color: #9aa3ab;
    color: #5d666d;
    background: #eceff1;
    cursor: not-allowed;
}

.challenge-summary {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
}

/* Progress: one row per difficulty, one square per maze */

.challenge-progress {
    margin-top: 12px;
}

.challenge-status {
    margin: 0;
    min-height: 1.4em;
    max-width: 74ch;
    color: #3c4750;
    line-height: 1.45;
}

.challenge-help-link {
    margin: 4px 0 0;
    padding: 0;
    border: 0;
    background: none;
    color: #1769e0;
    font: inherit;
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
}

.challenge-status-error {
    color: #9d2d26;
    font-weight: 600;
}

.challenge-tier-list {
    margin: 8px 0 0;
    padding: 0;
    list-style: none;
}

.challenge-tier {
    display: grid;
    grid-template-columns: 72px auto 1fr;
    align-items: center;
    gap: 10px;
    padding: 5px 0;
    border-top: 1px solid #dbe3ea;
}

.challenge-tier-name {
    font-weight: 600;
}

.challenge-tier-cells {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.challenge-tier-result {
    color: #3c4750;
    font-size: 13px;
}

/*
  Each square carries a symbol as well as a colour, so pass and fail are not
  told apart by colour alone.
*/
.challenge-cell {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: 26px;
    height: 26px;
    border: 1px solid #b9c2ca;
    border-radius: 4px;
    background: #ffffff;
    color: #4c5963;
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
}

.challenge-cell[data-state="running"] {
    border-color: #1769aa;
    color: #11598f;
    box-shadow: 0 0 0 2px rgba(23, 105, 170, 0.35);
}

.challenge-cell[data-state="pass"] {
    border-color: #27733b;
    background: #e9f7ec;
    color: #1c5a2c;
}

.challenge-cell[data-state="fail"] {
    border-color: #a33a32;
    background: #fbeceb;
    color: #8c2b24;
}

/* Failure card: the most useful thing on the page when it appears */

.challenge-failure {
    margin-top: 12px;
    padding: 12px 14px;
    border: 1px solid #d8a9a4;
    border-left: 5px solid #a33a32;
    border-radius: 5px;
    background: #fdf3f2;
}

.challenge-failure-title {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: #8c2b24;
}

.challenge-failure-text {
    margin: 6px 0 0;
    max-width: 74ch;
    line-height: 1.45;
}

.challenge-load {
    margin-top: 12px;
    padding: 11px 18px;
    border: 1px solid #155f96;
    border-radius: 4px;
    background: #1769aa;
    color: #ffffff;
    font: inherit;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}

.challenge-load:hover {
    background: #11598f;
}

.challenge-load:disabled {
    background: #8a949c;
    border-color: #77818a;
    cursor: wait;
}

.challenge-panel button:focus-visible {
    outline: 3px solid #17222a;
    outline-offset: 2px;
}

@media (max-width: 700px) {
    .challenge-tier {
        grid-template-columns: 72px 1fr;
    }

    .challenge-tier-result {
        grid-column: 1 / -1;
    }
}